如题所述
第1个回答 2022-10-26
（99+1）×78＝7800,10,（99+1）x78,2,99X78+78
=99X78+1X78
=（99+1)X78
=100X78
=7800,2,(100)*78,0,99X78十78＝78X99十78X1＝78X（99十1）＝7800,0,
=99X78+1X78
=（99+1)X78
=100X78
=7800,2,(100)*78,0,99X78十78＝78X99十78X1＝78X（99十1）＝7800,0,
